15949781298 has 24 divisors (see below), whose sum is σ = 37699483536. Its totient is φ = 4833267000.

The previous prime is 15949781261. The next prime is 15949781357. The reversal of 15949781298 is 89218794951.

15949781298 is a `hidden beast` number, since 1 + 59 + 497 + 8 + 1 + 2 + 98 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40277028 + ... + 40277423.

It is an arithmetic number, because the mean of its divisors is an integer number (1570811814).

Almost surely, 2^15949781298 is an apocalyptic number.

15949781298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15949781298 is an abundant number, since it is smaller than the sum of its proper divisors (21749702238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15949781298 is a wasteful number, since it uses less digits than its factorization.

15949781298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80554470 (or 80554467 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The spelling of 15949781298 in words is "fifteen billion, nine hundred forty-nine million, seven hundred eighty-one thousand, two hundred ninety-eight".